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2003 C270 CDi performance upgrades

Discussion in 'Tuning, Styling and Performance.' started by Benny Dub, Jan 8, 2018.

  1. V6Matty

    V6Matty Senior Member

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    I think it was the air intake setup and injectors that we're different as well as the turbo, I can't remember the exact details now but I still miss my 211 with that engine.
     
  2. alexanderfoti

    alexanderfoti Moderator

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    I have a soft spot for the 613 :p
     
  3. V6Matty

    V6Matty Senior Member

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    Lol, I wonder why;):rolleyes:
     
  4. alexanderfoti

    alexanderfoti Moderator

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    It must be the distant memories of a reasonable fuel range!
     
  5. John Laidlaw

    John Laidlaw Senior Member

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    Strangely it was the first engine I ever drove in the first Mercedes I had as an insurance loaner , great sound and grunt !
    Drove it over the Bealach na ba which was interesting !
     
    V6Matty and alexanderfoti like this.
  6. OP
    Benny Dub

    Benny Dub Senior Member

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    Wow thanks for all the responses guys - so basically the turbo upgrade isn't quite as simple as I thought it would be, and even if it was it sounds like it may or may not start to put the gearbox under excess strain.

    That's cool - I'm intrigued by the intercooler upgrade, are there any bolt-on upgrades or would it need a custom-fit front mounted set up?

    After driving a friend's E46 330D with no silencers or cats I definitely want to open the breathing up - that thing revved so freely!
     
  7. LostKiwi

    LostKiwi Senior Member

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    Gearbox should be fine as long as you don't increase the torque by more than 50%
     
  8. oigle

    oigle Senior Member

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    A standard ML270 has 400nm of torque so that doesn't gel. I mapped mine to 500nm - I was told that was well within the capability of the box - and have had no issues - I did increase the cooling of the tranny fluid.
    Ian.
     
  9. LostKiwi

    LostKiwi Senior Member

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    Yep Box is rated to 580Nm so 500 wouldn't be an issue in the C class.

    Interestingly the ML does appear to have a lower rated box (722.662 - W5A 300 so rated at 300Nm) according to everything I've found out.
     
    Last edited: Jan 11, 2018
  10. alexanderfoti

    alexanderfoti Moderator

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  11. LostKiwi

    LostKiwi Senior Member

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    No its correct. The 722.662 is the 320 gearbox. They're both W5A-300
     
  12. alexanderfoti

    alexanderfoti Moderator

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    W5A-300 has a rating of 300nm though?
     
  13. LostKiwi

    LostKiwi Senior Member

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    According to all the documentation I can find.
    Seems a bit weird though...

    C class 270CDi has gearbox rated to 580Nm
    E class 270CDi has gearbox rated to 580Nm
    ML 270CDi has gearbox rated to 300Nm?
     
  14. alexanderfoti

    alexanderfoti Moderator

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    I agree. Typical MB documentation doesn't match up with reality.
     
  15. V6Matty

    V6Matty Senior Member

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    I wonder if it's due to the 4matic system they dropped the torque?
     
  16. V6Matty

    V6Matty Senior Member

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    OP, intercooler upgrade is a bolt on, the 320 intercooler does just drop strait in but a custom one would be better. As before you have to start weighing up the cost against what your getting out of the car
     
  17. V6Matty

    V6Matty Senior Member

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    Is that the 613 or 647 your talking about John?
     
  18. John Laidlaw

    John Laidlaw Senior Member

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    Wasn’t too up on the technicalities and specs at that time Matt, but it was a W203 from 2005 so that would have been the 612 I think - 5 cylinder - not sure if this thread had moved on somehow :)
     
  19. alexanderfoti

    alexanderfoti Moderator

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    Or possibly the early models had the lower powered one and they swapped for the later ones
     
  20. Paul Goff

    Paul Goff Senior Member

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    Good thinking, add 50%+ more traction and extra weight! In extremis, something else has to give and the gearbox is a VERY expensive weak point! :eek:
     

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